SketchBook

MIDNIGHT

var xoff, yoff;

var time;

var colors = [];

function setup() {
createCanvas(windowWidth,
windowHeight);
background(39, 59, 108);

noFill();

colors.push(color(255, 255, 255, 128))
colors.push(color(0, 255, 255, 128));
colors.push(color(127, 255, 212, 128));
colors.push(color(135, 206, 250, 128));
colors.push(color(0, 0, 255, 128));
colors.push(color(35, 5, 55, 128));

xoff = 0.0;
yoff = 0.0;

time = 0;
}

function draw() {

var c = getColor(time);
stroke(c);

beginShape();
var xoff = 0;
for (var x = 0; x <= windowWidth; x += 5) {
var y = map(noise(xoff, yoff), 0, 1, 0, windowHeight);
curveVertex(x, y);
xoff += 0.03;
}
yoff += 0.002;
curveVertex(windowWidth,
windowHeight);
endShape();

time = time + 0.001;

if (time > 1.0) {
time = 0;
}
}

function getColor(t) {
var p = t * (colors.length - 1);
var from = floor(p);
return lerpColor(colors[from], colors[from + 1], p - from);
}